Method of winding condensers



Jan. 21, 1930.

R. H. CUNNINGHAM METHOD OF WINDING CONDENSERS 2 Sheets-Sheet 1 Filed Feb. 27, 1924 'INVENTOR P/CHA/QD H CU/V/W/V6/7AM 7/ BY r MORNEfi 21, 1930. R. H. CUNNINGHAM METHOD OF WINDING CONDENSERS Filed Feb. 27, 1924 2 Sheets-Sheet 2 INVENTOR Q/CHAPD h. CUNNINGHAM BY V4 Mv ATTORNEYS Patented Jan. 21, 1930 UNITED STATES mcnann n. CUNNINGHAM, on NEW YoRx, N. Y., ASSIGNORPTO' DUBILIER CONDENSER conroaa'non, A CORPORATION or DELAWARE METHOD OF WIN' D'ING CONDENSERS Application med February 27, 1924. Serial No. 695,568.

My invention-relates to improvements in methods of making condensers, especially K 'Figure 2 is a side view shown 1n F1gure 1';

electrical condensers for radio and other apparatus.

An object of this invention is to provide a novel way of manufacturing electric condensers, particularly coiled condensers, including strips of conductive material such as metallic foil, separated by a dielectric, wound or rolled upon one another to a depth consisting of as many layers as de sired; my improved process bein such that condensers of the type in question can be wound in multiple; that is, in the form of a single body containing the essential parts of two or more condensers, so that the winding or rolling can be easily and expeditiously performed; and then by the simple act of dividing the body at the proper points, the several separate condensers are at once obtained, the several condensers thus being produced with the expenditure of no more time than would otherwise be needed for one condenser; each condenser being ready for finishing by being encased, supplied with terminals for the conductive elements of opposite polarity and otherwise put into condition for use in an electric circuit.

Other objects and advantages of this invention will be apparent from the following description, taken with the accompanying method of winding condensersaccordingto my invention is practiced,

of the mechanism Figure 3 is a section online 33 of Fig- Figure 4 is a top view of the layers of conductive material and dielectric in the relative.

'1 and 2 by the numerals 1, 2, 3 and 4.

Figure 5 is a view similar to Figure 2, illustrating the manner of winding a larger number of condensers; and v Figure 6 is a section on the line 6-6 of Figure 5.

The same numerals identify the same parts throughout. A

In the practice of my invention, I make use of a number of shafts, indicated on Fi ures hese shaftsmay be-arranged in any desired relation and are preferably placed one higher than another, with the shaft 1 uppermost. On the shaft 4 are reels P, each consisting of-a coiled or wound-up strip 39 of suitabledielectric material, such as paper. The nearest shaft 3 above the shaft. 4" carries a 'pair of. rolls or reels F each consisting of a coiled or woundup strip f of, some suitable conductive material, such as metallic or tin-foil; the two reels F being in such position that the edges of thestrips f overlap or extend'beyond the edges of the paper strips 10 along thefar sides of the latter. a On the next highest shaft 2, is a pair of rolls P, similar in all respects to the rolls P on the shaft 4, and so placed that the strips p, as they are unwound from the rolls P on the shaft 2, will coincide along their side edges with the side edges ,of

the strips 7), coming from the rolls upon the shaft 4. The highest shaft 1 carries a reel I17 consisting of a rolled-up strip of metal foil f this strip being relatively wide so that it will lie across the space between thestrips p of paper directly beneath it. As the rolls P, F and F? are unwound, they pass beneath guide rods 9, mounted in a suitable upright support U'to a-shaft S, on the opposite side of the guides g and by means of this shaft, the

strips of conductive, material and dielectric are wound-up into the form of a coiled condenser. The guides 9 may simply be parallel rods in horizontal or other position, and the supports U, only one of which is shown in Figure 1, will engage the rods at their opposite ends.

Withthe conductive and dielectric strips and the sheets 1, 2, 3 and 4 disposed as illustratedin Figures-1, 2,3 and 4.. I can wind more than one condenser, in this instance,

- far ends of the tworeels P. Further the two reels P, carried by the shaft 2, are as close together as the reels P carried by the shaft 4,-

and the strips of pa er of. the reels carried by theshaft 2 are 0 the same width as the paper l'of the reels carried by the shaft 4. Also the reels F carried upon the shaft 1 and delivering the relatively wide strip f is shorter than the distance between the far ends of the reels P. Hence, when th reels are rotated to unwind the-strips p, f and and f therefrom, the reels P carried by the shaft 4 may be considered as supplying two strips of pa er p arranged side by side, .and the two ree s F on the shaft 3 may be regarded asfurnishing two strips of metallic foil f, one of'which is to be laid upon each of the strips p, as the strips are rolled up into the condenser C, but with the edges of the strips f along the, far sides of the strips 7, extending beyond the edges of the strlps go along the far sides of thesetwo strips; an with the adjacent or near edges of the two strips f terminating short'of the adjacent or near edges of the two strips p. Similarly, the rolls P upon the shaft '2 lay down upon 7 the foil strips f, strips of paper 1), the side edges of each of which coincide with the side edges of the strips p delivered from the reel P, upon the shaft 4 directly beneath thestrips 7'. Hence, the edges of the two strips 7 along their far sides project beyond the between which the two strips f are laid. On top of the strips 1) as the reels P on the shaft 2 are uniolled, is laid the strip of metallic foil f fromthe reel F mounted upon the shaft 1. This relatively wide strip f extends overor bridges the space between the two strips 7) directly? beneath it; but terminates short of the edges along the far sides of these two strips p. v p

Then as the shaft 3rotates, the condenser C is wound thereon in multiple,so to speak; the strips being rolled 'up in two sections, each section comprising two paper strips p with a strip of metallic foil 7" between them; and the two sections having a wide strip f in common; as indicated in Figure 3. Hence, the

condenser C consisting of a single body containing the essential parts of two distinct condensers, the body'of the condenser during the winding operation being a single body because the wide strip f extends over from one d. a roll F two strips p section to another and unites these sections, when the winding is completed, the body of the condenser C can be divided by cutting it in two, crosswise, along the line D-D, indicatedin Figures 2, 3 and 4. Thus two rolled condensers of theoutside woundtype are produced with the coils of the two strips 1 of each of these condensers projecting beyond the edges along one side of each of the strips p, and the divided parts of the strip 1, which has nowbecome two strips like the two strips 7, have their edges projecting beyond the edges of the two strips 2), along the opposite sides of same. The two rolled condensers can then be finished, each by uniting the projecting edges of the coils or turns of the strip 7 together at one end, and the projecting edges of the half of the strip f together at the opposite end, so that the-turns of the strip 7, which will be of one polarity, can be united to one terminal of the circuit in which the condenser is to be placed, and the turns of the other strip, consisting of the half of the strip f which will be of opposite polarity, can be conveniently united to the-other terminal of the circuit; and each condenser can be flattened, enclosed in a suitable case, and otherwise finished as desired. In Figures 5 and 6, I show a method of winding three condensers at one time, in the same way. Shafts 1, 2, 3 and 4 are employed as before, and the highest shaft 1 will carry consisting of a coiled strip P, be-, side another coil F consisting of a coiled strip of relatively great width f these two strips 7 and f being of conductive material and separated by a suitable distance. On the next lower shaft 2 will be mounted three reels P of paper, and on the shaft 3 below the shaft 2 will be mounted a reel F similar to the reel F upon the shaft 1, and ar'eel F similar to the reel F upon the shaft 1, but in reverse position; this is, the reel F will be at the right on shaft 1, and the reel F right; and the reel F furnishing the wide strip of foil,will be at the left. The lowest shaft 4 will carry three rolls of paper P.

As shown clearly in Figure 5, the rolls on the shafts 2 and 4 will be all of the same width, and the side edges of the strip p delivered by any oneof the rolls P upon the shaft 2, will be in coincident position with respect to the side edges of the strip 7) of the reel, in alinement therewith upon the shaft 4; that is to say, the side edges of any two strips p directly upon each other will be in vertical alinement. But the end of the roll F of the shaft 3 will extend beyond the adtwo rollsof paper P; but the opposite ends of the roll F will not be as far apart as the far ends of these other two rolls P, on the shaft 4. In the case of the shaft 1, the roll F supplying the wide strip 7, being at the right instead of at the left, as shown on the shaft 3; this wide strip will bridge the two paper strips at the right, of Figure 4; while the roll F on the shaft 1, will have one end projecting beyond the adjacent end of the nearest reel P on the shaft2, and its opposite end terminating short of the opposite end on this reel P.

When all the strips 9 of dielectric, and the conductive strips 7 and f are wound-up by the shaft S in the form of a coiled condenser, the operation is in multiple as before, and the condenser will at first consist of a single body including three sections united in pairs by the relatively wide strips of mil 7. First the three strips 2 are arranged or laid side by side, being talreln oif the reels P of the shaft 4 and constituting the lower layer of paper strips when one considers a section such as is presented in F igure 6. The reel F on the sha ft 3 supplies a strip of foil 7 to be laid upon the strip 32 at the right, this strip being for convenience designated as the first dielectric strip; and at the same time, the reel F on the shaft 3 supplies the wide strip of foil f to be laid down upon the second and third strips p, with the faredge of the strip 7, that is to say, the edge which is more remote from the strip f projecting beyond the adjacent edge of the strip p beneath it, and the the strip f terminating short of the opposite edge of the said strip p. Strip f although it extends across the space between the second and third strips p, has its opposite edges terininating short of the far or more distant edges of these two strips. From the reels P on the shaft 2, the strips of paper or other dielectric p are taken and laid upon the strips and f in such a way that the opposite edges ofeach strip of paper are directly above and flush or coincident with the opposite lateral edges of the strips p of the first layer. At the same time, the reel F on the shaft 1 supplies the strip of foil P, to be laid upon the third strip 72 of the second layer in the same rela-- tion thereto as the first strip f and with one edge of the strip f projecting beyond the edge of the two strips p, and inthe opposite direction with respect to the corresponding projecting edge of the first strip 7. Similarly, the relatively wide strip f is unwound from the reel F on the shaft 1, and laid upon the first and second strips 39 of the second layer of the three strips p, bridging these two strips p, but with its opposite edges terminating short of the far or more distant edges of these two strips p. Hence by means of the wide strips 7, each of the three sec tions of the body wound upon the shaft S, is at first connected to the other two sections, and this body now contains the essential parts opposite edge ofof three distinct condensers. After the winding is finished, the body can be divided by cutting it across along the two lines DD, so that each of the two wide strips f becomes two narrow strips, made up of one of the halves of the wide strips. The section at the right, for example, consists of two strips p, I

the foil strip f and half of one of the wide foil strips f while the section in the middle consists of two strips and two strips of foil each being the half of one of the wide strips f and the section at the left comprises two strips p, the strip of foil supplied by the reel F upon the shaft 1, and half of the wide strip of foil f delivered by the reel F on 'the shaft 3. The three condensers thus obtained can be further worked so as to connect the projecting edges of one strip of foil to one terminal, and the projecting edges of the other coiled strip of foil to another terminal, for inclusion in an electric circuit, and each condenser canbefiattened,enclosed in a casing or otherwise finished as desired.

With the apparatus and method illustrated in Figures 5 and 6, three condensers can be wound in multiple in no longer time than would be required for a single condenser.

In the practice of my invention, the arrangement of the rolls, and the motion of the strips are such that the operator can easily watch the strips 1), or a triple condenser 1s being wound, and the operation so controlled that the various strips can be kept moving in perfectly parallel directions so as to be wound in correct position upon the shaft S.

Having described my invention, what I believe to be new and desire to secure and protect by Letters Patent of the United States IS I f and 7, whether a double I I 1. Theprocess of making condensers, which consists in arranging strips of dielectric material side by side, laying a strip of conductive material upon each of said dielectric strips so that one of the strips of conductive material will have one edge extending beyond the edge atively wide strip" of conductive material which will extend across the space between them, but terminate short of the edges at the far sides thereof, and then winding all said strips together to form a rolled body which can be divided by severing the coils of the wide strip between the dielectric strips.

2. The process of making condensers, which consists in arranging a pair of strips of dielectric material side by side, laying a strip of conductive material on each of said di electric strips, with the edges of the strips of conductive material projecting'beyond the edges of the dielectric stri s at the far sides thereof, but terminating s ort of the'edges of the dielectric strips at the near sides there-. of, laying another dielectric strip on each of the conductive strips in position to coincide with the first dielectric strips, laying upon the other dielectric strips a relatively wide strip of conductive material which ex-- tends from one to the other, but terminates with its lateral edges short of thelateral edges of said other dielectric strips at the far sides thereof, winding all said strips together, in said positions, and then cutting through the coils of said wide strip between the coils of the first named conductive strip.-

3. The process of making condensers which consists in arranging three dielectric strips side by side, laying upon the first of said'strips a strip of conductive materialwhose one edge terminates short of the edge of said strip-on the side near the second strip, but whose opposite edge extends beyond the other edge of said dielectric strip, placing a second strip of conductive material upon the second and third dielectric strips, said second conductive strip of the lower layer,

strip bridging the adjacent side edges of said dielectric strips but terminating short of the opposite edges, placing upon the conductive strips three separate dielectric strips in position'to coincide alongtheir side-edges with the first three dielectric strips, -pla cing upon such dielectric strips a second relatively wide conductive stri directly above the first and second dielectric strips of the first layer, said second wide. strip extending over the adjacent side edgesof. thetwo dielectric strips of the second layer, but terminatingshort of the which consists in simultaneously winding relatively wide and narrow strips of conductive material in staggered relation se arated by dielectric materia controlling sai strips while winding in such manner that certain of the strips are laid side by side in spaced relation to form a unit containing a lurality of condenser bodies, and subsequent y dividing the relatively wide conductive strips in such manner as to separate the condenser bodies, whereby a plurality of outside wound condensers are formed with one winding operiil h I flix testimony w ereof a my si ature. RICHARD H. CUNNINGfiM.

edges at theiar sides thereof, placing upon the third dielectric strip-of the secondlayeranother conductive strip of the same width and in the same relative position as the first conductive ,strip upon the fii st dielectric then winding all saidstripsto form a single body, and then dividing the body'by cutting through the coils of said wide conductive strips between the di-- electric strips; 4 4:. The process of making condensers which consists in simultaneouslywinding strips of I conductive material'oi varpin'giwidths' separated by dielectric materia controlling said I strips whilewwiiiding in such mannerthat certain of I s aced relation to -form a unit containing a.

' such manner as e stripsarelaid side by side in;

ra'lity of condenser bodies, and subsequent-' ly dividingcertain of the conductive strips in to separate the condenser bodies. I

5. The process of making condensers iao 

